Pushmi-Pullyu is named after the legendary creature from Dr. Dolittle's story. It is an gazelle-unicorn cross which has two heads (one of each) at opposite ends of its body. When it tries to move, both heads try to go in opposite directions. Dr. Dolittle meets it on his voyage to Africa to save monkeys.
I called this picture pushmi-pullyu because it looks like one creature with 2 heads.